NML 40 - A 2 part cold cure system used in the
field for the repair of NML 46 on interior engine compressor components.
NML 40 has a relatively short shelf life of 6 weeks at room temperature
but this can be extended be freezing.
NML 46 - A factory production product not really
suited to field application because it is normally stored in a frozen
state. Widely used on all sizes of turbine engine as a wear away coating.
Usually applied as a thick film on the inside of engine rings against
which the stator blades run. When a major overhaul is required the material
can be stripped off and replaced negating the need to replace a costly
ring. NML 46 is used with primer NML 52.
NML 58 - A extended shelf life version of NML
40 for field and overseas use. A shelf life of 1 year is offered when
stored at or below 20°C.
EPWA 27 - Also known as PX/HX 443D. A graphite
filled two part attrition compound which has almost totally replaced
an earlier multi-coat spray system. Uses include the engine rings of
the AV-8B Harrier. Hardness 75 shore D - ASTMD 2240. Ask for RPS 340/1
for application.
690-155-010 Probably one of the original attrition
coatings, which is sprayed as a multi coat system. It is still used
in Japan and this material has over 40 years constant use. Apply for
a separate data sheet (CAT1/690-155-010). Ask for RPS 340 for application.
Complies with DTD 900-4743 and AFS 609.
General - All of the above can be machined,
and when damaged are easier to repair than an engine ring, making the
on the ground time for the engine considerably less. Process specifications
are too detailed to include here, further information is available from
our Technical department.
